Tractor



FIG. 1 is a right side view of a tractor showing our new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is an upper right front perspective view thereof; and,

FIG. 7 is an upper right rear perspective view thereof.

The portions of FIGS. 1-7 shown in coarse dot pattern and outlined indashed lines form no part of the claimed design.

A bottom view is omitted because it is plain and unornamental and formsno part of the subject matter of the claimed design.

CLAIM The ornamental design for a tractor, as shown and described.